Which of the following statements is/are true?

I) Sound is a form of energy

II) Sound stops when the vibration of an object stops

III) Sound is a transverse wave

IV) Sound travels better in a heavy gas than in a light gas

Q. Which of the following statements are correct?
(i) Sound is produced by vibrations.
(ii) Sound requires a medium for propagation.
(iii) Light and sound both require a medium for propagation.
(iv) Sound travels faster than light.

Q. Question 3
Which of the following statements are correct?
(i) Sound is produced by vibrations.
(ii) Sound requires a medium for propagation.
(iii) Light and sound both require a medium for propagation.
(iv) Sound travels slower than light.

(a) i, ii and iv only
(b) i and ii only
(c) i, ii and iii only
(d) ii, iii and iv only

Q.

Which object is vibrating when the following sounds are produced ?

(i) The sound of a sitar

(ii) The sound of a tabla

(iii) The sound of a tuning fork

(iv) The buzzing of a bee or mosquito

(v) The sound of a flute

Q. Fill in the following blanks with suitable words.
(a) Sound waves are caused by ____________.
(b) A sound wave consists of places of higher pressure called ____________ and places of lower pressure called ____________.
(c) Wave speed in meters per second equals frequency in ____________ multiplied by ____________ in ____________.
(d) Sound cannot travel through ____________.
(e) The sound travels ____________ in a solid than in a gas.
(f) When the frequency of the sound is increased, the wavelength ____________.

Q. Following statements which are true for light waves but not for sound waves are/is